From patchwork Thu Apr 11 09:06:24 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Charles Keepax X-Patchwork-Id: 788083 Received: from mx0b-001ae601.pphosted.com (mx0b-001ae601.pphosted.com [67.231.152.168]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 9572613CF91; Thu, 11 Apr 2024 09:06:39 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=67.231.152.168 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1712826401; cv=none; b=Uvy3D6Lx7tpc6S5RjrvKtyO1DjOcgfiB9d4wkDFaXNjuaMicjQuz/UINS8AWcBGbWCkZMClJiFmf0teB8zFwCy4eWjvgtYx5cIQrI/pZ6y9NEEtabjxZhKmxWtd0b8OYXqMhzA7pRdLkSMPUcrzkSfwJnOBpkDXwrHvMT6jcnxg= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1712826401; c=relaxed/simple; bh=Dw4OiJySKJyi55x3c7YHB1abWRK7uxOPkFLeIeCWC1g=; h=From:To:CC:Subject:Date:Message-ID:MIME-Version:Content-Type; b=Qg2XOMpp6BA7naokex8VnPeHekU8a7gdl4KrjoBW01QOZ9T2fxxsFw+Qj4avE772nMXVcsOJz/mzeknSruGfVIG1xU2rsQQNKdk+4OwPqLbDbNnn6sgenQ8jtyWwCLMHMVcZJMgPF4xkainrfI+GWznyAK+sV1e/sBjD1eoBLHk= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=opensource.cirrus.com; spf=pass smtp.mailfrom=opensource.cirrus.com; dkim=pass (2048-bit key) header.d=cirrus.com header.i=@cirrus.com header.b=ojbC6CIx; arc=none smtp.client-ip=67.231.152.168 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=opensource.cirrus.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=opensource.cirrus.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=cirrus.com header.i=@cirrus.com header.b="ojbC6CIx" Received: from pps.filterd (m0077474.ppops.net [127.0.0.1]) by mx0b-001ae601.pphosted.com (8.18.1.2/8.18.1.2) with ESMTP id 43B5naFK004518; Thu, 11 Apr 2024 04:06:32 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=cirrus.com; h= from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding:content-type; s=PODMain02222019; bh=L pYSOT7i5AL8Na8w+Od+/QE7jZeltnffRlfPOlqLx6E=; b=ojbC6CIxhWalYpXMY 0A3Q7We5bO1YPXwSREopQHNeaJ98/jDaq+yGf8QXilslgLrLaOp1nkiVz/xSbbG+ oE/E7gbwwhfn0Jf1DV5ImINuZLzxMgQMPEhLRWeBDOaLgsqiFQBh7dMaVQg1u+4l 4ttot5FmOX8fvQjaoim7coW/H7Wi3mFdV5q1y+Aauo8tyrAEugWhUod6VeoSJBjv HaFJtPeU1KMg/IaHmyb+Ru1eZlg4Deb7GYglAvJgiO8UVpX4lLGXvH+Rdi+npSiM NZhu2+ZW1O9N+ZJetIxgUi6nb2oH5u9e2IxesIPlahMt1W5ty2JEOGgXAPSF3OnR D6hiQ== Received: from ediex01.ad.cirrus.com ([84.19.233.68]) by mx0b-001ae601.pphosted.com (PPS) with ESMTPS id 3xb2tjq0gx-2 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Thu, 11 Apr 2024 04:06:31 -0500 (CDT) Received: from ediex01.ad.cirrus.com (198.61.84.80) by ediex01.ad.cirrus.com (198.61.84.80) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1544.9; Thu, 11 Apr 2024 10:06:28 +0100 Received: from ediswmail9.ad.cirrus.com (198.61.86.93) by ediex01.ad.cirrus.com (198.61.84.80) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1544.9 via Frontend Transport; Thu, 11 Apr 2024 10:06:28 +0100 Received: from ediswws07.ad.cirrus.com (ediswws07.ad.cirrus.com [198.90.208.14]) by ediswmail9.ad.cirrus.com (Postfix) with ESMTP id 6B6B6820243; Thu, 11 Apr 2024 09:06:28 +0000 (UTC) From: Charles Keepax To: , , CC: , , , , Subject: [PATCH 0/4] Add bridged amplifiers to cs42l43 Date: Thu, 11 Apr 2024 10:06:24 +0100 Message-ID: <20240411090628.2436389-1-ckeepax@opensource.cirrus.com> X-Mailer: git-send-email 2.39.2 Precedence: bulk X-Mailing-List: linux-gpio@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Proofpoint-ORIG-GUID: RuqMV_EM_wbH8HdoqjpApFZaHVksYb89 X-Proofpoint-GUID: RuqMV_EM_wbH8HdoqjpApFZaHVksYb89 X-Proofpoint-Spam-Reason: safe On some cs42l43 systems a couple of cs35l56 amplifiers are attached to the cs42l43's SPI and I2S. On Windows the cs42l43 is controlled by a SDCA class driver and these two amplifiers are controlled by firmware running on the cs42l43. However, under Linux the decision was made to interact with the cs42l43 directly, affording the user greater control over the audio system. However, this has resulted in an issue where these two bridged cs35l56 amplifiers are not populated in ACPI and must be added manually. There is at least an SDCA extension unit DT entry we can key off. The process of adding this is handled using a software node, firstly the ability to add native chip selects to software nodes must be added. Secondly, an additional flag for naming the SPI devices is added this allows the machine driver to key to the correct amplifier. Then finally, the cs42l43 SPI driver adds the two amplifiers directly onto its SPI bus. An additional series will follow soon to add the audio machine driver parts (in the sof-sdw driver), however that is fairly orthogonal to this part of the process, getting the actual amplifiers registered. Thanks, Charles Series changes since v4: - Remove extraneous fwnode_handle_puts in driver/spi/spi-cs42l43.c - Make Kconfig for swnode undef gpios not user visible - Add some missing headers - Add patch to update handling in spi_dev_set_name - Remove stray blank line - Use ACPI_HANDLE_FWNODE Series changes since v3: - Add Kconfig to make swnode conditionally built - Add define for swnode name - Add custom init and exit calls to register swnode - Use export namespaces - Always name swnode SPI devices after the node name - Correct some header includes - Use HZ_PER_MHZ - Use some swnode helper macros - Use acpi_get_local_address - Correct some handle puts - Add some dev_err_probes Series changes since v2: - Add missing fwnode_handle_puts in driver/spi/spi-cs423l43.c Series changes since v1: - Add missing statics in driver/spi/spi-cs42l43.c Charles Keepax (2): gpio: swnode: Add ability to specify native chip selects for SPI spi: Add a mechanism to use the fwnode name for the SPI device Maciej Strozek (1): spi: cs42l43: Add bridged cs35l56 amplifiers Charles Keepax (3): gpio: swnode: Add ability to specify native chip selects for SPI spi: Switch to using is_acpi_device_node() in spi_dev_set_name() spi: Update swnode based SPI devices to use the fwnode name Maciej Strozek (1): spi: cs42l43: Add bridged cs35l56 amplifiers drivers/gpio/Kconfig | 3 + drivers/gpio/gpiolib-swnode.c | 40 ++++++++++ drivers/spi/Kconfig | 1 + drivers/spi/spi-cs42l43.c | 135 +++++++++++++++++++++++++++++++++- drivers/spi/spi.c | 13 +++- include/linux/gpio/consumer.h | 4 + 6 files changed, 191 insertions(+), 5 deletions(-)